多孔单分子磁体的设计、构筑与研究

Single-molecule magnet not only has significant scientific value in the coupling between macroscopic properties and quantum characteristics, but also has broad application prospects in the high-density information storage and quantum computing. It is currently a major challenge to blend single-molecule magnets and porous materials, and use organic guest molecules to control and optimize the performance of single-molecule magnets in the field of molecular magnets. This project explores the use of the guest molecule to manipulate and regulate the weak interaction between the single-molecule magnets, the magnetic anisotropy of single-molecule magnets, and magnetic energy barrier. In the specific implementation,we plan to composite single-molecule magnet unit in the porous materials via pre-design. Utilizing the weak interactions between host and guest, we will study the the difference of the single-molecule magnet behavior under the control of different guest molecules, and reveal the physical origin of the single-molecule magnet behavior in this process. Such study will help us understand quantum phenomena and their effects, study quantum control and manipulation, thus to fully understand nanoscale magneto- structural relationship. The understand of the coupling behavior beween the classical magnetic properties and quantum characteristics will provide new ideas to develop nanosensors and good spintronics devices.

单分子磁体不仅在宏观性质与量子耦合方面具有重大的科学研究价值，而且在高密度信息存储和量子计算领域具有广阔的应用前景。如何将单分子磁体和多孔材料有机融合在一起，利用客体分子控制和优化单分子磁体的性能，是当前分子磁体领域的一个重大挑战。本项目主要探索利用客体分子操纵和调控单分子磁体间弱相互作用的途径，实现对单分子磁体磁各向异性和磁能垒的调控。在具体的实施中，主要通过预先设计，在多孔材料中复合单分子磁体单元，利用客体分子调控的主客体间的弱作用，研究不同客体分子调控下单分子磁体行为的差异，在此过程中揭示影响单分子磁体行为的物理根源，深刻认识量子现象和效应，研究量子调控和操纵，充分理解纳米尺度上的磁构效关系以及经典磁行为和量子特性耦合与相互作用规律，为发展纳米传感器、获得优良的自旋电子学器件提供新思路。

在国家自然科学基金青年基金的资助下，密切联系当前分子基磁性材料发展的前沿与趋势，形成了富有特色的多孔磁体研究方向。利用建筑单元定向构筑，分别合成了单分子磁体和单链磁体。通过固体反应，成功制备了多孔磁体，其表现出选择性的气体吸附。研究成果发表在Dalton Transactions 和Inorganic Chemistry Communications上，其它的工作正在整理中。